GB/T 22264.7-2022 Active

This document specifies the product classification, grading, and compliance of installed digital display electric measurement multifunctional instruments, technical requirements, information, general markings and symbols, inspection rules, and packaging, storage, and transportation. This document applies to newly manufactured installed digital display electric measurement multifunctional instruments used to measure various electrical parameters in distribution systems with a DC voltage of up to 750 V and an AC voltage of up to 690 V, and a nominal frequency of 50 Hz or 60 Hz. It also applies to the digital display parts of electric measurement multifunctional instruments with analog/digital dual displays. This document does not apply to: -- multifunctional instruments with direct-acting analog indicators; -- portable digital display multifunctional instruments; -- multifunctional instruments for special purposes that are subject to separate national standards (or industry standards).